ATSAM4LS2CA-AU - ARM Cortex-M4 MCU 48MHz 128KB | Microchip
MPN: ATSAM4LS2CA-AU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.55 | $55.50 |
| 100 | $4.89 | $489.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.95 | $3,950.00 |
ATSAM4LS2CA-AU Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy: semiconductor -> 32-bit MCU -> ARM Cortex-M microcontroller -> SAM4L series. The ATSAM4LS2CA-AU belongs to the SAM4L family originally developed by Atmel (now Microchip Technology), based on the high-performance 32-bit ARM Cortex-M4 RISC processor.
Key features include the 48 MHz Cortex-M4 core with DSP instructions, 128 KB flash for code storage, 32 KB SRAM, a picoPower low-power architecture suited to battery operation, hardware cryptographic acceleration (as noted by Mouser: CRYPTO), and an industrial operating temperature range (-40C to +85C). The Green/RoHS-compliant TQFP package with gull-wing terminals supports standard surface-mount assembly.
Per the Atmel/Microchip ATSAM4LS2CA datasheet, the SAM4L family integrates a rich peripheral set including USB, USART, SPI, TWI, and analog peripherals, with low-power modes controlled by the peripheral event system, allowing peripherals to operate while the CPU sleeps.
Typical applications include low-power industrial sensing nodes, consumer and portable battery-powered devices, motor and lighting control, and general-purpose embedded control where 128 KB flash and a 100-pin I/O budget fit the design.
Design consideration: the device operates at 3.3 V; verify supply sequencing and use proper decoupling on the VDDIO/VDDCORE domains per the datasheet power section.
This page synthesizes distributor pricing, pin-compatible same-family alternatives, and practical design notes not found on a single distributor page, with data verified against DigiKey, Mouser, Octopart, and FindIC listings as of 2026-09-20.
Drop-in alternatives for ATSAM4LS2CA-AU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAM4LS2CA-AU (same form factor and footprint) — differing in Flash Memory, Wake-up Time, Package, Packaging, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4LC2CA-AU
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATSAM4LC4CA-AU
✅ Drop-In✓ In Stock
$6.65 / Unit
View Datasheet →ATSAM4LS4CA-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4LC8BA-UUR
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATSAM4LS8CA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$12.45 / Unit
View Datasheet →ATSAM4LS2CA-AU Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 48 MHz |
| Flash Memory Size | 128 KB (128K x 8) |
| SRAM Size | 32 KB |
| Supply Voltage | 3.3 V |
| Package | 100-TQFP (14 x 14 mm) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Operating Temperature | -40C to +85C (Industrial) |
| Series | SAM4L |
| Special Features | Hardware Crypto, Low Power (picoPower) |
| RoHS Status | Compliant (Green) |
| Moisture Sensitivity Level | MRL A |
ATSAM4LS2CA-AU 100-tqfp (14 x 14 mm) Pin Configuration Guide
Pin configuration for ATSAM4LS2CA-AU (100-tqfp (14 x 14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAM4LS2CA-AU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4LS2CA-AU is suitable for 6 applications: Low-Power Industrial Sensing Nodes, Portable Battery-Powered Devices, Motor and Lighting Control, IoT Sensor Endpoints, Medical and Health Monitoring Devices, General-Purpose Embedded Control.
Low-Power Industrial Sensing Nodes
Industrial sensor nodes require long battery life, robust peripherals, and deterministic processing. The ATSAM4LS2CA-AU fits this role with its picoPower SAM4L architecture: the Cortex-M4 core at 48 MHz handles signal processing bursts, while multiple sleep modes keep average current low between samples. The peripheral event system allows ADC sampling and DMA transfers to proceed without waking the CPU, dramatically cutting energy per measurement. With 128 KB flash there is room for the sensor firmware, compensation algorithms, and a communication stack, while 32 KB SRAM buffers sample data. The industrial -40C to +85C rating and RoHS-green 100-TQFP package suit factory floor and outdoor installations.
Recommended
Portable Battery-Powered Devices
Handheld and wearable products combine a limited battery with demanding user interfaces. The ATSAM4LS2CA-AU addresses this with the SAM4L low-power design that scales clock and voltage domains dynamically, plus sleep modes that drop consumption to microamp levels between interactions. The 48 MHz Cortex-M4 with DSP instructions accelerates touch decoding, UI rendering math, and sensor fusion, while 128 KB flash stores the application and graphics assets. Hardware crypto acceleration secures paired accessories and firmware updates without heavy software overhead. The 100-pin TQFP offers generous GPIO for keypads, displays, and peripherals, and the industrial temperature range tolerates varied portable environments.
Recommended
Motor and Lighting Control
Motor control and LED lighting systems need precise PWM generation, fast interrupt response, and analog feedback integration. The ATSAM4LS2CA-AU provides timer/PWM peripherals within its SAM4L peripheral set, and the Cortex-M4 core at 48 MHz executes control loops with single-cycle MAC instructions for PI filter computation. The 3.3 V I/O domain interfaces cleanly with gate drivers and current-sense amplifiers, while the 100-pin count supplies multiple PWM channels plus UART/SPI links to supervisory controllers. Hardware crypto enables secure parameter provisioning in networked luminaires. With 128 KB flash, control firmware, communication protocol, and diagnostics coexist comfortably in a single device.
Recommended
IoT Sensor Endpoints
IoT endpoint devices marry low sleep current with enough compute for protocol stacks and light security. The ATSAM4LS2CA-AU fits: its picoPower modes keep radios and sensors fed through a low-duty-cycle schedule managed by the peripheral event system, while the 48 MHz Cortex-M4 wakes briefly to packetize data and run AES-secured payloads via the hardware crypto engine. The 128 KB flash holds the application plus a compact MQTT/CoAP or BLE-adjacent stack, and 32 KB SRAM buffers message queues across disconnected periods. The industrial temperature grade covers unconditioned deployment sites, and the gull-wing TQFP supports standard reflow assembly for volume production.
Recommended
Medical and Health Monitoring Devices
Personal health monitors require accurate analog acquisition, data integrity, and long battery runtime. The ATSAM4LS2CA-AU supports these needs with the SAM4L precision analog peripherals and 12-bit-class acquisition path for biosignals such as ECG or pulse-oximetry front ends, processed by the 48 MHz Cortex-M4 with DSP instructions for filtering algorithms. Hardware crypto accelerators protect patient data at rest and in transit, an increasingly mandatory feature. Sleep-mode discipline through the peripheral event system maximizes battery life in continuous-wear form factors. The 100-pin TQFP gives ample I/O for displays, USB, and sensor arrays in a single-controller architecture rated -40C to +85C.
Recommended
General-Purpose Embedded Control
Many products simply need a dependable 32-bit controller with balanced memory and I/O. The ATSAM4LS2CA-AU serves as a versatile main controller: 128 KB flash accommodates application plus bootloader, 32 KB SRAM handles protocol buffers and state machines, and the ARM Cortex-M4 core ensures long-term toolchain and RTOS support with extensive CMSIS-compatible software. Rich USART, SPI, TWI, and USB connectivity (per the SAM4L datasheet peripheral set) links displays, storage, and networks. The 100-pin TQFP 14 x 14 mm footprint suits both cost-sensitive two-layer and dense multilayer boards, and its availability across DigiKey, Mouser, Newark, and Octopart-tracked distributors simplifies sourcing as of 2026-09-20.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4LS2CA-AU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4LC2CA-AU | ATSAM4LC4CA-AU | ATSAM4LS4CA-AU | ATSAM4LS8CA-AU |
|---|---|---|---|---|---|
| Package | 100-TQFP (14 x 14 mm) | 100-TQFP (14 x 14 mm) - same | 100-TQFP (14 x 14 mm) - same | 100-TQFP (14 x 14 mm) - same | 100-TQFP (14 x 14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz | ARM Cortex-M4 @ 48 MHz |
| Flash Memory | 128 KB | 128 KB | 256 KB | 256 KB | 512 KB |
| Memory Architecture | Standard flash (LS) | Cache-enhanced (LC) | Cache-enhanced (LC) | Standard flash (LS) | Standard flash (LS) |
| Hardware Crypto | Yes (CRYPTO per Mouser listing) | Yes | Yes | Yes | Yes |
Key Differentiators
- Hardware crypto acceleration at standard-grade price (vs ATSAM4LS4CA-AU)
- Lowest memory cost in a pin-compatible family (vs ATSAM4LC4CA-AU)
- Drop-in compatibility across the whole SAM4L 100-pin CA family (vs ATSAM4LS8CA-AU)
Design Notes
The ATSAM4LS2CA-AU operates from a 3.3 V supply with separate VDDIO/VDDCORE domains per the SAM4L datasheet. Place 100 nF ceramic decoupling capacitors at each supply pin pair, plus 4.7-10 uF bulk capacitance near the package. Estimate: a 48 MHz active-mode run with all peripherals on is on the order of tens of milliamps (consult the datasheet power consumption table for exact figures), so a typical USB-5V-to-3.3V LDO such as a 250 mA-class regulator provides comfortable headroom for the MCU plus external sensors.
The 100-TQFP (14 x 14 mm) has 0.5 mm pitch gull-wing leads. Use a solder-mask-defined land pattern per IPC-7351 (verify against your PCB CAD library), with thermal relief on the central die-attach paddle if tied to ground. Route SWD (SWCLK/SWDIO) traces short and away from switching regulators, and provide a standard 10-pin Cortex debug header footprint even if unpopulated in production - it costs nothing and saves rework during bring-up and firmware update debugging.
Do not assume pin-for-pin equivalence outside the SAM4L family: peripheral multiplexing on the 100 pins differs between vendors, so only same-family alternatives listed here are verified drop-ins. Another common pitfall is omitting the VDDCORE decoupling or ignoring power-mode transition timing in the SAM4L clock controller - waking from deep sleep modes requires the PLL/oscillator stabilization time specified in the datasheet. Flash programming voltage and lock-bit behavior should also be reviewed before enabling boot protection in the field.
Estimated: an MCU of this class dissipating roughly 50-100 mV-class logic power (tens of mA at 3.3 V, i.e., ~0.1-0.3 W worst case) rises only a few degrees C above ambient over the TQFP theta_JA, well within the -40C to +85C industrial rating. Thermal design is only a concern if you stack high-current drivers near the package; keep hot components (LED drivers, motor gate resistors) at least 10 mm away or provide ground-plane heat spreading between them and the MCU.
Compliance Information
Mouser listing explicitly describes the part as 'TQFP, Green', indicating RoHS/Green (lead-free, halogen-restricted) compliance. No AEC-Q100 automotive qualification indicated in retrieved data. REACH and conflict-minerals status not stated in the provided sources.
